If you're really worried about that put the two points over in Improved Rune Tap instead. Being able to heal yourself more efficiently is a more more useful mechanic than excess static health pool... which nobody but tanks need anyway.
Mages, rogues, et al, will have less HP than us anyway. If it's not improving your DPS, and it's not a filler point for something further down the tree, it's time to re-evaluate that talent selection if you're serious about PvE raid DPS.